PAScal Safety Calculator

Calculation tool to verify functional safety

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Depending on the components used, the PAScal Safety Calculator calculates the PL (Performance Level) and SIL (Safety Integrity Level) achievable for safety functions on plant and machinery. The result is verified with the required PL in accordance with EN ISO 13849 / SIL in accordance with EN/IEC 62061. The tool will indicate any action that is needed. Experience the full complexity of PAScal in a simple, entertaining animation!

Free download and contact

The licence-free version of the PAScal software is available to download free of charge. Depending on your requirement, you can also purchase a licence key to take advantage of the many additional functions available with the full version.

If you have any questions on Pascal, you can reach our international hotline on: +49 711 3409-444 or support@pilz.com.

Top performance with a wide range of functionalities

Editor enables individual component libraries to be created, and the export to other formats, such as the VDMA 66413 library format

Applications

Step 1 – Create a project in accordance with EN ISO 13849-1

The first step is to record the general data for your project or machine. This is based on a set operating sequence or is alternatively entered directly in the project management utility. The version can either be tracked automatically with the current date or via a user-definable version number.

Step 2 – Create safety functions in accordance with EN ISO 13849-1

Next, step by step, you create the corresponding safety functions to cover every risk. Give the safety functions a name and describe their meaning. Either enter the required PLr (in accordance with EN ISO 13849) directly or determine it from the risk graphs.

Step 3 – Model the safety functions in accordance with EN ISO 13849-1

The next step is to model the individual safety functions from the available circuit diagrams. It is rare that you will have to enter components yourself, thanks to the extensive libraries. They can simply be dragged from the libraries into the editor window via "drag and drop".

Search function for different components

The more libraries and components are created, the more difficult it is to identify the correct components in accordance with EN ISO 13849. A search function is helpful here. It is only necessary to select between the various versions or applications of a device once the basic device has been selected. Additional documents, graphics, circuit diagrams and similar can be added at any time, to add descriptive detail to the assessment.

Are the components products with a rate of wear that depends on the number of cycles? Then an integrated conversion tool will help you to determine these values from the information that is normally available. The Safety Calculator displays the data required for the respective device or structure.

The tool also assesses the CCF of course (= Common Cause Failure). The list of questions from EN ISO 13849-1 serves as a helpful checklist for commenting on the entries.

If the required safety level PLr has not yet been achieved, this will be immediately visible in the form of warnings on the critical elements. Throughout the modelling process, you can view the current state of the assessment for all safety functions in accordance with EN ISO 13849-1 / EN/IEC 62061 in the SRP/CS Result tab.

Step 4 – Final assessment and report in accordance with EN ISO 13849-1

The final report contains all the necessary information for archiving. Its scope, design and language can be adapted to your requirements.

Entirely new configurations are rare, so much of the data can be re-used in the next project. As a result, determination of the safety level in accordance with EN ISO 13849-1 becomes refreshingly easy!

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